From: Sidda6 (sidda6@gmail.com)
Date: Tue Jan 20 2009 - 03:47:49 ARST
From your explanation I understood my scenario is by default using
per-destination load balancing. So, how does router determines source
interface for the packet here ( with per-destination ) .. does it pick
randomly any one of two interfaces or is there there any specific
criteria. ( Is there anything ARP cache plays role here with respect
to picking up of source interface of packet)
On Mon, Jan 19, 2009 at 3:30 PM, Pavel Bykov <slidersv@gmail.com> wrote:
> Default max-paths is 4 for all except BGP, (which is 1) so command is not
> needed.
> If IP route outputs two destinations, the load balancing is taking place.
> Usually, CEF will do per destination load balancing.
> Setting on the interface defines the method and can be per packet (depends
> on platform)
>
> for information about CEF tables, use:
>
> "show ip cef 155.1.146.0 internal"
>
> So, to be exact and answer your questions:
> 1. Depends on the method, per packet or per destination. Packets are load
> balanced
> 2. Not required.
>
> On Mon, Jan 19, 2009 at 8:24 AM, Sidda6 <sidda6@gmail.com> wrote:
>>
>> I have route to 155.1.146.6 from my route table: route table looks like
>> this->
>>
>> R5# show ip route
>> O IA 155.1.146.0 [110/65] via 150.1.0.4, 00:01:26, Serial0/0/0
>> [110/65] via 150.1.0.1, 00:01:26, Serial0/0/0
>>
>> R5#show ip route 155.1.146.6
>> Routing entry for 155.1.146.0/24
>> Known via "ospf 1", distance 110, metric 65, type inter area
>> Last update from 150.1.0.4 on Serial0/0/0, 00:04:06 ago
>> Routing Descriptor Blocks:
>> 150.1.0.4, from 160.1.4.4, 00:04:06 ago, via Serial0/0/0
>> Route metric is 65, traffic share count is 1
>> * 150.1.0.1, from 160.1.1.1, 00:04:06 ago, via Serial0/0/1
>> Route metric is 65, traffic share count is 1
>>
>> 1. what happens with OSPF path selection to destination network when
>> we have multiple equal costs...which path it selects in my case? if it
>> selected Serial0/0/1.. why it did not picked even Serial0/0/0 has
>> equal cost.
>> 2. Do i need to use max-paths command to load maximum-paths to
>> loadbalance between two interfaces?
>>
>> Regards,
>> Sidda
>>
>>
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>
>
>
> --
> Pavel Bykov
> ----------------
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